Sriprakash Verma

ORCID: 0000-0003-2716-5959
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About
Contact & Profiles
Research Areas
  • Particle accelerators and beam dynamics
  • Magnetic confinement fusion research
  • Superconducting Materials and Applications
  • Plasma Diagnostics and Applications
  • Gyrotron and Vacuum Electronics Research
  • Electrostatic Discharge in Electronics
  • Electromagnetic Launch and Propulsion Technology
  • Pulsed Power Technology Applications
  • Smart Grid Security and Resilience

Institute for Plasma Research
2015-2023

Integrated Test Range
2017

The ITER Ion Cyclotron Heating and Current Drive system (IC H&CD) is designed to deliver 20MW a broad range of plasma scenarios between 40 55MHz, during very long pulses. It consists two broadband equatorial port plug antennas, their pre-matching matching systems, transmission lines, Radio Frequency (RF) Sources High Voltage Power Supplies. overall project schedule has been revised agreed by Council; it re-integrates the second antenna its power supplies in construction baseline sets dates...

10.1051/epjconf/201715702002 article EN cc-by EPJ Web of Conferences 2017-01-01

IndianDomestic Agency is responsible for the development and delivery of total nine numbers RF sources ITER ion cyclotron heating current drive (ICH CD) system. To validate design amplifier source, a research program has been initiated. Each ICH CD source consists two chains amplifier, each chain composed low-power section, one solid-state power followed by cascaded tunable high-power tube (tetrode/diacrode)-based amplifiers, high-voltage/highcurrent supplies, control A dedicated data...

10.1109/tns.2017.2785814 article EN IEEE Transactions on Nuclear Science 2017-12-21

ITER-India is responsible to deliver nine (8+1 spare) ICH & CD Power Sources ITER. Each power source capable 2.5 MW at 35 65 MHz frequency range with a load condition up VSWR 2:1. For remote operation of different subsystems, Local Control Unit (LCU) developed. LCU developed using PXI hardware and Schneider PLC Lab VIEW-RT developmental environment. All the protection function amplifier running on 7841 R module that ensures hard wired logic. There are three level function- first by supply...

10.1088/1742-6596/823/1/012036 article EN Journal of Physics Conference Series 2017-04-19

ITER-India, working as a nodal agency from India for ITER project [1], is responsible to deliver one of the packages, called Ion Cyclotron Heating & Current Drive (ICH&CD) - Radio Frequency Power Sources (RFPS). RFPS having two cascaded amplifier chains (10 kW, 130 kW 1.5 MW) combined get 2.5 MW RF power output. Directional couplers are inserted at output each stage extract forward and reflected samples measurement amplitude phase. Using passive mixer, down converted 1MHz Intermediate...

10.1088/1742-6596/823/1/012058 article EN Journal of Physics Conference Series 2017-04-19

The high-power radio frequency source for ion cyclotron heating and current drive of ITER tokamak consists two identical 1.5 MW amplifier chains. These chains will be combined using a wideband hybrid combiner with adequate coupling flatness, phase balance, return loss, isolation response to generate 2.5 (RF) power in the range 36 60 MHz. As part in-house development program at ITER-India, flatness loss/isolation better than 0.4 −25 dB, respectively, has been simulated. A detailed analysis...

10.1063/5.0132176 article EN Review of Scientific Instruments 2023-02-01
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